/// <summary>
/// Initializes a new instance of the <see cref="ObjectObserverRegistration"/> class.
/// </summary>
/// <param name="observer">The observer.</param>
/// <exception cref="System.ArgumentNullException">observer cannot be null</exception>
public ObjectObserverRegistration(PropertyPathObserver observer)
{
if (observer == null)
throw new ArgumentNullException("observer");
this.observer = observer;
this.observer.PropertyPathChanged += Observer_PropertyPathChanged;
this.Actions = new List<PropertyPathChangedAction>();
}
/// <summary>
/// Initializes a new instance of the <see cref="PropertyPathObserver"/> class.
/// </summary>
/// <param name="obj">The object to monitor.</param>
/// <param name="propertyPathStack">The property path stack, this stack will be consume
/// after this function completes.</param>
/// <param name="parent">The parent of this path if any, null if this is the root.</param>
/// <exception cref="System.ArgumentNullException">propertyPathStack cannot be null</exception>
/// <exception cref="System.ArgumentException">
/// propertyPathStack must have at least one item
/// or
/// path contains a non property member
/// </exception>
private void Initialize(INotifyPropertyChanged obj, Stack<MemberExpression> propertyPathStack, PropertyPathObserver parent)
{
if (propertyPathStack == null)
throw new ArgumentNullException("propertyPathStack");
if (propertyPathStack.Count == 0)
throw new ArgumentException("propertyPathStack must have at least one item");
var path = propertyPathStack.Pop();
if (!(path.Member is PropertyInfo))
throw new ArgumentException("path contains a non property member");
this.propertyInfo = (PropertyInfo)path.Member;
this.ObservableObject = obj;
this.Parent = parent;
if (propertyPathStack.Count > 0)
{
this.Child = new PropertyPathObserver();
this.Child.Initialize(this.PropertyValue as INotifyPropertyChanged, propertyPathStack, this);
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
this.observer.PropertyPathChanged -= Observer_PropertyPathChanged;
this.observer.Dispose();
this.observer = null;
}